docs: def convert_wav(org_wav_fn: Path, tgt_wav_fn: Path) -> None:
      """ Converts the wav into a 16bit mono 16000Hz wav.
  
          Args:
              org_wav_fn: A `Path` to the original wave file
              tgt_wav_fn: The `Path` to output the processed wave file
      """
      if not org_wav_fn.exists():
          raise FileNotFoundError
      args = [config.FFMPEG_PATH,
              "-i", str(org_wav_fn), "-ac", "1", "-ar", "16000", str(tgt_wav_fn)]
      subprocess.run(args)